1 /* 2 ** Copyright 2006, The Android Open Source Project 3 ** 4 ** Licensed under the Apache License, Version 2.0 (the "License"); 5 ** you may not use this file except in compliance with the License. 6 ** You may obtain a copy of the License at 7 ** 8 ** http://www.apache.org/licenses/LICENSE-2.0 9 ** 10 ** Unless required by applicable law or agreed to in writing, software 11 ** distributed under the License is distributed on an "AS IS" BASIS, 12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 package com.android.calendarcommon2; 18 19 import java.util.Calendar; 20 21 /** 22 * According to RFC2445, durations are like this: 23 * WEEKS 24 * | DAYS [ HOURS [ MINUTES [ SECONDS ] ] ] 25 * | HOURS [ MINUTES [ SECONDS ] ] 26 * it doesn't specifically, say, but this sort of implies that you can't have 27 * 70 seconds. 28 */ 29 public class Duration 30 { 31 public int sign; // 1 or -1 32 public int weeks; 33 public int days; 34 public int hours; 35 public int minutes; 36 public int seconds; 37 Duration()38 public Duration() 39 { 40 sign = 1; 41 } 42 43 /** 44 * Parse according to RFC2445 ss4.3.6. (It's actually a little loose with 45 * its parsing, for better or for worse) 46 */ parse(String str)47 public void parse(String str) throws DateException 48 { 49 sign = 1; 50 weeks = 0; 51 days = 0; 52 hours = 0; 53 minutes = 0; 54 seconds = 0; 55 56 int len = str.length(); 57 int index = 0; 58 char c; 59 60 if (len < 1) { 61 return ; 62 } 63 64 c = str.charAt(0); 65 if (c == '-') { 66 sign = -1; 67 index++; 68 } 69 else if (c == '+') { 70 index++; 71 } 72 73 if (len <= index) { 74 return ; 75 } 76 77 c = str.charAt(index); 78 if (c != 'P') { 79 throw new DateException ( 80 "Duration.parse(str='" + str + "') expected 'P' at index=" 81 + index); 82 } 83 index++; 84 if (len <= index) { 85 return; 86 } 87 c = str.charAt(index); 88 if (c == 'T') { 89 index++; 90 } 91 92 int n = 0; 93 for (; index < len; index++) { 94 c = str.charAt(index); 95 if (c >= '0' && c <= '9') { 96 n *= 10; 97 n += ((int)(c-'0')); 98 } 99 else if (c == 'W') { 100 weeks = n; 101 n = 0; 102 } 103 else if (c == 'H') { 104 hours = n; 105 n = 0; 106 } 107 else if (c == 'M') { 108 minutes = n; 109 n = 0; 110 } 111 else if (c == 'S') { 112 seconds = n; 113 n = 0; 114 } 115 else if (c == 'D') { 116 days = n; 117 n = 0; 118 } 119 else if (c == 'T') { 120 } 121 else { 122 throw new DateException ( 123 "Duration.parse(str='" + str + "') unexpected char '" 124 + c + "' at index=" + index); 125 } 126 } 127 } 128 129 /** 130 * Add this to the calendar provided, in place, in the calendar. 131 */ addTo(Calendar cal)132 public void addTo(Calendar cal) 133 { 134 cal.add(Calendar.DAY_OF_MONTH, sign*weeks*7); 135 cal.add(Calendar.DAY_OF_MONTH, sign*days); 136 cal.add(Calendar.HOUR, sign*hours); 137 cal.add(Calendar.MINUTE, sign*minutes); 138 cal.add(Calendar.SECOND, sign*seconds); 139 } 140 addTo(long dt)141 public long addTo(long dt) { 142 return dt + getMillis(); 143 } 144 getMillis()145 public long getMillis() { 146 long factor = 1000 * sign; 147 return factor * ((7*24*60*60*weeks) 148 + (24*60*60*days) 149 + (60*60*hours) 150 + (60*minutes) 151 + seconds); 152 } 153 } 154